Albebt schmid



A. S'CHMID.

Y Y CAHBURUER. l APPLICATION FILED JUNI-:12, 1918. RENEWED JULY 2 7 INVENToR BY n.-

Patented D00. 23, 19419.

ATTORNEY UNITED STATES PATENT oFFicE.

` ALBERT scmnnor LONG BEACH, NEW vom;

`cAmnntETEnh y Specication of Letters Patent. l' Patented Dec. 23,1919.

application led .Tune 12, 1918, Serial No.-2`-39,6,84.V .Renewed July 22, 1919;V Serial'No. 312,576. l

To all whom t 'may concern: l

Be it known that I, Arnnni SCHMID, a

i citizen of fthe United States, and a resident of vided by which readily combustible charges ently LongI Beach, L. I., New York, have made a new and useful Invention in Carbureters, of which the following is. a'specilication.

This invention relates to charge forming A'devices'for interna-l combustion engines and .more particularly to devices supplemental to the main carbureter for forming combustible charges for starting andV during th'e warming up period.

The use of heavy not readily inflammable liquid fuel suchy as kerosene and distillates and some of the so calledy commercial gasolenes in internal combustion engines, and especially in engines Subj ect to varying loads makes hit important that some means lbe vpromay -be supplied during the warming :up periods or until the enginebecomesl Warm enough to care for the 'charges supplied by the main charge forming device or carbureter.- l

I nd that it is imp-racticable in` most cases,

to heat the main carbu-reter, either by electricity orothe'r means, suiiciently to form proper charges during the warming up period.y vAn object` of this invention is to provide. a supplemental or auxiliary starting charge forming device by means of which (durmg the warming up periods and until the engine is sufficiently warm to be operated upon the main carbureter) readily combustible charges may supplied independof the main carbureter. A A further object is to providel an efficient of electric energy will effectively heat the fuel content of the starting charges in lsuch manner that when the charges reach the en gine 'cylinders they' will be readily infiam- .mable and will burn with a minimum of objectionable deposit or smoke. v

' This as well as other objects, which will readily4 appear to those skilled inthis-particular art, I attain by means of the de vice illustrated in the single sheet of drawlngs accompanying and forming a parto'f this application and in which the ligure represents in sectional elevation a carbureter em j bodying this invention.

The device primarily consists of a tortu- `ous passage through which thecombustible charges or at least the fuel content thereof,

relation to said passage and an agent having l relatively great capacity for heat storage and which is in heat transferring relation' with reference to said tortuous passage and said electric heater. v L

Thel form of device shown in the drawings c'onslsts of a tube 2 preferably formed of copperwound around a cylindrical member 3 serv'mg as a passage for exhaust gases from an engine exhaust pipe 4. .,The inner surface of member 3' is provided with longitudinally extending ribs 5 for the purpose of facilitating the transfer of heat from the hot `gases passing through member 3 to the member proper and the tortuous passage.

Member 3 which forms the central channel, ofthe device is preferably made as a part of a base 6 which contains a liquid fuel reservoir and passage 7 adapted to beconnected by means of a. pipe 8 to any suitable lsource of liquid fuel supply. e The base 6 is also-providelwith a liquid fuel valve 9 connected by means of passage 10 with reservoir 7 and'having its effective area controlled by means of a needle valve 11 of ordinary construction. i An air chamber 12 is formed in base member 6 and `surrounds the exhaust gas conduit 3. The liquid' fuel chamber 7 also surrounds said exhaust gas conduit' and because of this the liquid fuel and air passing through chambers 7 and 12 respectively are heated. Air chamber 12 is providedwitl an inlet 13 and an outlet 14 leading to a point adjacent the outlet of liquid fuel nozzle 9. A

valve 15 provided with an enlarged guiding and sealing portion'tl is slidably mounted within a tubular extension 1 7 of base member 6 arranged axially in line with liquid fuel nozzle 9. Valve 15 controls the flow of liquid fuel through nozzle 9 and its enlargement 16 controls the passage of mixturefcomposed of liquid. delivered by nozzle'9 and air passing through chamber .12 to tortuous passage 2l through the connecting Vchannel 18 which connects the inlet of tubular member 17 Withand suitably insulated within a heater housing surrounds and contacts with the tubing forming tortuo'us passage 2.

A'cylindrical wall 23 forms a housing surroundingY and spaced apart from the heater elementy and which extends from the outer margin of base member 6x to a cap member 24 which closes the upper part of the housing. The cap 'or cover 24 is provided with a lug 25 which forms a support for bell crank 21 and the cap is provided with a assa 26 communicating with the inlet manifold27 of the engine in connection with whichthe device is to be used. Outlet`28 of thetortuous passage connects with passa k26.

assage 26 is also provided with an vauxil-` of electric energy (here shown as a storage battery and the circuit'36 is controlled by means of a switch 37.

The housing of thev chamber formed by means of base 6, cylindrical wall 23 yand. cap V2l and within which the tortuous passage-and the heater elements are situated is filledxvith material 38 and this is preferably a material which has the capacity of storing heat and may either be a solid such as lead or a liquid such as Water, although if a vaporizable liquid such as water 1s used, some means must be `provided for the escape of the vapor and replenishment of the liquid, and for that reason a metal such as lead is preferable. This `may be poured into the chamber after the elements above described are assembled in place and as it flows around the tube forming'fthe tortuous passage `and around the electric heater it is in eiiicient heat conducting relation to the walls of the exhaust passage 3, the electric heater and the tortuous passage.

It will be understood that if sulicient-elec-V tric'current is available this device maybe utilized as the main carbureter device of the engine but as the supply of electric current on most automotive devices is limited lit is preferable to use this 4in conjunction with the main carbureter as a starting-chargeforming device and when so used passage 26,

that is the outlet passage for the combustible `charges, will be connected between the main charge forming device and the engine so that the main charge forming device while this device is in operation may be cut out of operation by means of its throttle valve.

In utilizing this device as a starting charge forming device, by closing switch 37 the electric heater will heat the metallic walls of thetortuous passage i-n a short time sufiiciently .to render the charges passing through said passage readily combustible and will so superheat them that when they reach the inlet manifold of the engine in the form of hot vapors they will ynot be condensed or deposited along the'inlet manifold walls.

The electric heater element at the same time it is heating the tortuous passage heats the heat storage material 38 and this mate-v rial as well as the tortuous passage is 1n turn heated by the exhaust gases passing through channel 3` as soon as thel engine starts to operate and to deliver exhaust gases.

It has been found that by having asuiiicient heat-'storage body in contact with the exhaust passage and the tortuouspassage the en 'ne may be readily started after considera le periods of rest without utilizing the electric heater.

As only a, small portion of ,the air enters:

1. In a charge forming device for internal i combustion engines, a .fuel nozzle, a tortuous passage communicating therewith, means for-electrically heating said passage, means for passlng exhaust ses in heat transferring relation to sai passa e and a heat storage agent in contact Wit said passage and said electric heating means:

2. In a charge forming device for internal combustlon engines,.a fuel nozzle, a tortuous passage communicating therewith, means for electrically heating said passage and a heat storage agent in contact with said passage and said electric heating means.

3. In a charge forming devicefor internal combustion engines, a helical assage connected to the engine inlet manlfold, means for supp'lylng said passage with fuel, means for passing exhaust gases in heat conducting relation to said passage, a chamber surrounding said passage, an electric heater in said chamber and a heat storage agent with- 1n said chamberand in contact with the walls of said passage and said Vheater.

4. In a charge forming device for internal combustion engines, a tortuous tubular assage connected to the engine inlet ma old, means for supplying said passage with fuel, means for passing exhaust gases in heat conducting relation to said passage, a chainber surrounding said passage, an electric heater in said chamber and a heat storage agent within said chamber and in contact with the walls of said passage and said heater.

5. A charge f orming device for internal combustionengines, comprising means. Vfor said passage and to said heat storage agent.

6. A charge forming device for internal combustion engines, comprising means forv forming relative rich mixtures of liquid fuel and air, a tortuous. passage between said means and the englne inlet manifold, an

electric heaterfor said passage, and a heatf storage agent in heat transferring relation to said passage. 7. In a charge form-ing device for internal combustion engines, a Walled passage for exhaust gases, a tube coiled around said passage and having its outlet in communication with the engine inlet manifold, a fuel nozzle communicatlng with the inlet of said passage, a valve controlling said fuel nozzle `and an electric heater in heat transfer'- rin-g relation to said passage.

8. In a charge forming device for internal.

combustion engines, a walled conduit for exhaust gases, a passage surrounding said conduit and having its outlet in communication with the engme inlet manifold, a fuel nozzle communicating with the inlet of said passage, a' valve controlling said fuel nozzle and an electric' heater in heat transferring relation to said passage.

9. In a charge -forming device for internal combustion engines, a walled passage for exhaust gases, a tube coiled around said pas.- sage and having its outlet in communication with the engine inlet manifold, a fuel nozzlev communicating with the inlet of said tube, a valve controlling said fuel nozzle, an electric heater and a heat storage agent surrounding said tube and in contact with said passage.- Y

10. In a charge forming device for internal combustion engines, a Walled passage for exhaust gases, ahelical conduit surrounding said lpassage and having its outlet in cross communication with the engine inlet manifold', a -fuel nozzle communicating with the inlet of said conduit, a valve controlling said fuel nozzle anda heat storage agent surrounding said conduit and/ in contact With said passage.

11. .In combination with a Walled passage for conducting exhaust gases from `an internal combustion engine, a fuel conduit surrounding said passage, an electric heater' surrounding said conduit, a heat storage agent surrounding and in Contact with said heater, said conduit and said passage, means including a valve for supplying said conduit with controlled charges of fuel, a supplemental air valve for said device and common means for controlling both of said valves.

12. In a charge forming device for internal combustion engines, a fuel nozzle, a passage Acommunicating therewith, means for electrically heating said passage and a heat storage agent' in contact with. said passage and said electrical heating means.

13. In a charge-forming device for internal combustion engines, a fuel nozzle; a passage of relatively great length and small section communicating therewith, means for electrically heating said passage,

a 'heat storage agent in contact With said"v passage and said electrical heating means,

and means for heating said heat storage sage and said electrical heating means, and

means for ypassing exhaust gases in heat transferring relation to said heat storage agent. i A

In testimony whereof, I have hereunto subscribed my name this 7th day of June,

ALBERT scHMID. 

